Fence tightening spool



FIG. 1 is a perspective view of a fence tightening spool of the present invention.

FIG. 2 is a side elevation view of the fence tightening spool shown in FIG. 1, the opposite side being identical.

FIG. 3 is a side elevation view taken 90° from FIG. 2, the opposite side being identical; and,

FIG. 4 is a top plan view of the fence tightening spool shown in FIG. 1, the bottom plan view being identical. 

We claim the ornamental design for a fence tightening spool, as shown and described. 